Fuel problems 1989 300ce new fuel pump,filter and relay fuel pressure at distribution block but nothing at injectors

Then your fuel pump is not working, or your fuel filter is blocked. You will probably have to check your fuel pump circuit if you have no fuel pressure in the fuel rail, where the injectors sit. There is a fuse for the pump, usually in the under hood fuse/relay block. That is probably also where the fuel pump relay is located. You should hear or feel this relay click when the ignition key is cycled from off to on. Also, when the key is turned to on, you should hear the fuel pump in the gas tank turn on for about 2 seconds. This will put the pressure in the gas in the fuel rail, for starting the engine. If you don't hear the pump turn on for that 2 second period, it is probably a bad fuel pump. But know the fuse is good first.

What make vehicle are you working on ? Is the engine computer turning on the injectors ? How to test fuel injector circuit with basic tools

Spark at plugs? Fuel filter? Pressure on injector delivery line? Pressure relief valve? You may be able to measure fuel pressure at the pressure relief valve location. and return line. If you have spark, I'd say it's a fuel supply problem

First start with basics check your fuses related to fuel and or injectors and make sure you have voltage. Next check your crank sensor sometimes when the sensor goes bad the computer doesn't know you are trying to start the engine because the signal the sensor is supposed to put out to the computer isn't there due to a faulty sensor once the computer senses the signal from the crank sensor then it will send a command to the injectors to start pulsating gas let me know how it turns out for you thanks.

fuel pump relay

If you have no fuel pressure at the engine when key is on, the pump is not coming on. Check fuel pump fuse, check fuel pump relay (relay should click when key turned to on-put finger lightly on it and feel for click when someone turns key to on). If no click, signal from computer may be lost, ground for relay may be lost, or relay may be bad. If it clicks, wiring from relay to pump may have failed, or the relay's main power source may not be there at relay-find the fuse link or maxi-fuse that powers that relay. One terminal at relay should be hot at all times-can check for that with a test light.
If pump is working and you do have fuel pressure, you will need to check injector circuit. Post back if questions, or need further help.

Check fuel pressure. Have you replaced the fuel filter on schedule? Verify that the fuel pump is getting power. Power goes through an in-line fuse, then the fuel pump relay or the oil pressure sensor. (The relay bypasses the oil pressure sensor while the engine starts, but fuel pump power goes through the sensor during normal run operation. If you lose oil pressure, the fuel pump is shut off to protect the engine.) On four-cylinder models, the fuse is in the fuse block (E PUMP 10)
The fuel injectors are connected to the ECM fuse on one side and straight to the engine computer on the other side. Check the connectors and wiring, especially at the injector.

i have a 95 honda civic and it will crank but not start, ive heard they have a common fuel pump relay problem so i bought a new 1 and also a new fuel pump but yet still the car will not start. we i turn the key the fuel pump does not engage and am stumped. ive checked all the fuses but there all good. any ideas please help . thanks

Did you change the fuel filter? Or maybe clogged injectors.

check your fuel pressure it should be 35 psi .fuel pump relays dont go out but check all fuses with test light there is a fuel injector fuse but most likely problem is your fuel pump!